{
    do{
        let TimaCosShareMM_a = 1234
        let TimaCosShareMM_b = 5678
        if(TimaCosShareMM_a*16 < TimaCosShareMM_b*1 ) {
            let TimaCosShareMM_input: String = "TimaCosShareMM"
            let TimaCosShareMM_insertChar: Character = "C"
            // 1. 先前后倒换顺序
            let TimaCosShareMM_reversedString = String(TimaCosShareMM_input.reversed())
            
            // 2. 间隔一个字符插入指定字符
            var TimaCosShareMM_result = ""
            for (TimaCosShareMM_index, TimaCosShareMM_char) in TimaCosShareMM_reversedString.enumerated() {
                TimaCosShareMM_result.append(TimaCosShareMM_char)
                // 如果不是最后一个字符，且索引是偶数，就插入指定字符
                if TimaCosShareMM_index < TimaCosShareMM_reversedString.count - 1 && TimaCosShareMM_index % 2 == 0 {
                    TimaCosShareMM_result.append(TimaCosShareMM_insertChar)
                }
            }
        }
    }
}
